<template>
  <view v-if="goods_info.goods_name" class="goods-detail-container">
    <!-- 轮播图区域 -->
    <swiper :indicator-dots="true" :autoplay="true" :interval="3000" :duration="1000" :circular="true">
      <swiper-item v-for="(item, index) in goods_info.pics" :key="index">
        <image :src="item.pics_big" @click="previewImage(index)"></image>
      </swiper-item>
    </swiper>
    <!-- 商品信息区域 -->
    <view class="goods-info-box">
      <!-- 商品价格 -->
      <view class="price">￥{{goods_info.goods_price}}</view>
      <!-- 信息主体区域 -->
      <view class="goods-info-body">
        <!-- 商品名称 -->
        <view class="goods-name">{{goods_info.goods_name}}</view>
        <!-- 收藏 -->
        <view class="favi">
          <uni-icons type="star" size="18"></uni-icons>
          <text>收藏</text>
        </view>
      </view>
      <!-- 运费 -->
      <view class="yf">快递：免运费 --{{total}}</view>
    </view>
    <!-- 商品详情图片 -->
    <rich-text :nodes="goods_info.goods_introduce"></rich-text>
    <!-- 商品导航组件 -->
    <view class="goods_nav">
      <!-- fill 控制右侧按钮的样式 -->
      <!-- options 左侧按钮的配置项 -->
      <!-- click 点击左侧按钮的回调函数 -->
      <!-- buttonClick 点击右侧按钮的回调函数 -->
      <uni-goods-nav :fill="true" :options="options" :button-group="buttonGroup" @click="onClick" @buttonClick="buttonClick" />
    </view>
  </view>
</template>

<script>
  //从vuex中按需导入mapState辅助函数
  import {mapState} from 'vuex'
  // 按需导入 mapMutations 这个辅助方法
  import { mapMutations } from 'vuex'
  // 按需导入mapGetters辅助函数
  import { mapGetters } from 'vuex'
  export default {
    data() {
      return {
        //商品详情对象
       goods_info : {},
       //左侧按钮的配置项
       options: [{
         icon: 'shop',
         text: '店铺'
       }
        ,{
         icon: 'cart',
         text: '购物车',
         info: 0
       }],
       //右侧按钮的配置项
       buttonGroup: [{
         text: '加入购物车',
         backgroundColor: '#ff0000',
         color: '#fff'
       },
       {
         text: '立即购买',
         backgroundColor: '#ffa200',
         color: '#fff'
       },
       ]
        
      };
    },
    computed: {
      //将购物车的数量映射为计算属性
      ...mapState('m_cart', ['cart']),
      //将购物车的数量映射为计算属性
      ...mapGetters('m_cart', ['total'])
    },
    onLoad(options) {
      //获取商品id
      const goods_id = options.goods_id
      //调用获取商品详情的方法
      this.getGoodsDetail(goods_id)
    },
    methods: {
      //把m_cart中的addToCart方法映射到当前页面
      ...mapMutations('m_cart', ['addToCart']),
      async getGoodsDetail(goods_id) {
        //获取商品详情
        const {data: res} = await uni.$http.get('/api/public/v1/goods/detail', {goods_id})
        if (res.meta.status !== 200) return uni.$showMsg()
        //处理图片懒加载
        res.message.goods_introduce = res.message.goods_introduce.replace(/<img/g, '<img style="display:block;"').replace(/webp/g, 'jpg')
        //为data中的商品详情赋值
        this.goods_info = res.message
      },
      //预览图片
      previewImage(index) {
        uni.previewImage({
          current: index,
          urls: this.goods_info.pics.map(x => x.pics_big)
          })
        },
        //点击商品导航栏
      onClick(e) {
        if (e.content.text === '购物车') {
          uni.switchTab({
            url: '/pages/cart/cart'
          })
        }
      },
     
      //点击右侧按钮
      buttonClick(e) {
        //将商品信息对象映射到商品对象中
        if(e.content.text === '加入购物车'){
          const goods = {
            goods_id: this.goods_info.goods_id,
            goods_name: this.goods_info.goods_name,
            goods_price: this.goods_info.goods_price,
            goods_count: 1,
            goods_small_logo: this.goods_info.pics[0].pics_big,
            goods_state: true
          }
          //将商品对象调用addToCart方法添加到购物车
          this.addToCart(goods)
          
        }
      },
     
        
      
    },
    watch: {
      // 定义total的监视器，当total的值发生变化时，自动调用这个监视器的回调函数
      total: {
        handler(newVal) {
          // 通过数组的 find 方法，找到购物车中，满足条件的那个商品对象
          const findResult = this.options.find(x => x.text === '购物车')
          // 动态更新 findResult 对象的 info 属性
          findResult.info = newVal
        },
        // 代表是否在组件创建的时候就立即触发
        immediate: true
      }
    }
  }
</script>

<style lang="scss">
  swiper {
    height: 750rpx;
    image {
      width: 100%;
      height: 100%;
    }
  }
  //商品信息区域样式
  .goods-info-box {
    padding: 10px;
    padding-right: 0;
    .price {
      color: #c00000;
      font-size: 18px;
      margin: 10px 0;
    }
    .goods-info-body {
      display: flex;
      justify-content: space-between;
      .goods-name {
        font-size: 13px;
        margin-right: 10px;
      }
      .favi {
        width: 120px;
        font-size: 12px;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        border-left: 1px solid #efefef;
        color: gray;
      }
    }
    .yf {
      margin: 10px 0;
      font-size: 12px;
      color: gray;
    }
  }
  .goods-detail-container {
    padding-bottom: 50px;
  }
  .goods_nav {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
  }

</style>
